Improvement in grate-bars



G. M. BALL. Grate-Bars.

N0.154,440. 'i L Patented Augl.25,1874.`

@y1 l I l "I l UNITED STATESI PATENT OFFICE.

GEORGE M. BALL, OF GREEN POINT, BROOKLYN, NEW YORK, ASSIGNOR TO BALL & JEWELL,OF SAME PLAGE.

IMPROVEMENT IN GRATE-BARS.

Specification forming part of Letters Patent No. 154,440, dated August 25, 1874; application tiled July 3o, 1874.

To all whom it may concern Be it known that I, GEORGE M. BALL, of Green Point, in the city of Brooklyn, county of Kings and State of New York, have invented an Improvement in Grate-Bars, of which the following is a specification:

My invention relates to certain improvements whereby the bars of a grate may be removed and replaced separately, and whereby, also, each bar may be shaken' independently, or the bars may be connected so as to be shaken simultaneously. The invention consists in the combination of a frame and a slotted bar provided with a lever and with rocking bearings for the bar, whereby a longitudinally-reciprocating motion may be irnparted to each bar independently of the other bars.

In the accompanying drawing, Figure l is a top view of my improved` grate-bar. Fig. 2 is a side view. Fig. 3 is a longitudinal vertical section. Fig. 4 is a transverse vertical section.l v

The frame A is formed with two abutments, a, one at each end, which abutments rest upon the bearers for supporting the bars in the furnace. The sides of the frame are curved in cOncavo-convex form, with the convex edge downward, and the concave edge parallel therewith. Between the curved sides ofthe frame works the bar proper B, resting on bearers b, which are pivotedto said frame, and have their upper ends or edges engaging with notches or depressions c in the lower side of the bar B. Oneof the pivoted bearers b extends vdownward below the pivot, so as to form an oscillating lever, by means of which areciprocating rectilinear motion may be imparted to the bar B. The bar B has two slots extending for nearly its entire length, and entirely through from top to bottom, thus dividing the tire-surface of the bar into three parts,.

the lower portions of which are narrower than the upper surface, extending downward in the form of ribs, and having the lower edges curved in a form nearly parallel with the upper or concave edge of the curved portion of the frame. The sides of the frame A are bent inward for the greater portion ofthe length thereof, and are provided with projections or ribs d on theouter sides, so that the body B rests partly over `the side of theframe, and when several bars are placed side by side in a grate the projections or ribs l come in contact with each other, and preserve the proper distance between the different bars, which distance is about equal to the width of the slot in the bar.

By the construction and arrangement shown herein the bars may be removed and replaced separately and independently of each other, and each bar may be shaken independently ot' the others. The lower ends of the levers or elongated bearers b are provided with eyes b", by means Of which all the bars in the grate may, if desired, be connected, so as to be shaken simultaneously.

At the ends of the frame A, immediately i over the abutments a, the metal hangs over the ends of the bar B, and covers them from side to side, so that when the bar is shaken its ends pass under the overhan ging portions Of the frame, and all dust and ashes which may be on the upper surface near the ends are shaken down and pass through the slots into the ash-box.,

What I claim as new, and desire to secure by Letters Patent, is-

In a grate-bar, the combination of the frame A, formed with the abutments a. and ribs d, the slotted bar B, and the rockers b, one Ot' which serves as a lever, substantially as and for the purpose shown and described.

GEORGE M. BALL.

Witnesses HENRY T. BROWN, VERNON H; HERR is. 

